Does a mother suffering from Alzheimer's, who is not aware of anything, inherit from her deceased son, and does the deceased's brother inherit?

The estate of a man who passed away, leaving behind a mother, a wife, three sons, and three daughters, is divided as follows: the wife receives one-eighth, the mother receives one-sixth, and the remaining portion goes to the children, with the male receiving the share of two females. His full brother does not inherit because he is excluded by the presence of a male child. Alzheimer's disease affecting the mother does not impact her share; rather, her share is established as part of her wealth.